List of museums in Washington
This list of museums in Washington state encompasses museums defined for this context as institutions that collect and care for objects of cultural, artistic, scientific, or historical interest and make their collections or related exhibits available for public viewing. Also included are non-profit and university art galleries. Museums that exist only in cyberspace are not included. Defunct museums are listed in a separate section.
List of museums
| Name | Town/City | County | Region | Area of study | Summary |
| Aberdeen Museum of History | Aberdeen | Grays Harbor | Southwest | History - Local | |
| Admiralty Head Lighthouse | Coupeville | Island | Puget Sound | Maritime | Located in Fort Casey State Park |
| Alaska Packers Association Cannery Museum | Blaine | Whatcom | Northwest | Maritime | , includes a restored Bristol Bay sailboat, Alaska Packers' Association and fish cannery exhibits, located in Semiahmoo Park |
| Alder Creek Pioneer Carousel Museum | Bickleton | Klickitat | Central | Amusement | Collection of carousel horses, open once a year |
| Alpowai Interpretive Center | Clarkston | Asotin | Eastern | History | , exhibits on meeting of Lewis and Clark and the Nez Perce Indians |
| America's Car Museum | Tacoma | Pierce | Puget Sound | Transportation - Automobiles | Also known as LeMay - America's Car Museum, includes over 300 collector cars on the grounds of the former Marymount Military Academy |
| American Hop Museum | Toppenish | Yakima | Central | Agriculture | , history and future of hops cultivation |
| Anacortes History Museum | Anacortes | Skagit | Northwest | History - Local | , exhibits include Native Americans and early settlers, fishing and logging industries, changing exhibits; located in a Carnegie Library building; also operates the Anacortes Maritime Heritage Center |
| Anacortes Maritime Heritage Center | Anacortes | Skagit | Northwest | Maritime | Exhibits about the adjacent drydocked WT Preston sternwheeler and other snagboats |
| Ansorge Hotel | Curlew | Ferry | Eastern | Historic site | Early 20th century period hotel in a ghost town |
| Antique Car & Truck Museum | Curlew | Ferry | Eastern | Transportation | Cars, trucks, antique farm machinery and a blacksmith shop |
| Asotin County Museum | Asotin | Asotin | Eastern | Open-air | , complex includes main museum with local history displays, pioneer house, sheepherder's cabin, one room schoolhouse, log cabin, barge, barn, blacksmith shop and Tipi |
| Aurora Valentinetti Puppet Museum | Bremerton | Kitsap | Puget Sound | Puppetry | , part of the Evergreen Children's Theatre |
| Bainbridge Island Historical Society Museum | Bainbridge Island | Kitsap | Puget Sound | History - Local | , located in a 1908 schoolhouse |
| Bainbridge Island Museum of Art | Bainbridge Island | Kitsap | Puget Sound | Contemporary Arts | , The Bainbridge Island Museum of Art is an educational institution whose mission is to engage a diverse population with the art and craft of our region and our time. |
| Bellevue Arts Museum | Bellevue | King | Puget Sound | Art | Changing exhibits of art, craft and design |
| Bellingham Maritime Museum | Bellingham | Whatcom | Northwest | Maritime | , exhibits include area canning company, fishing industry, shipyards, ship models, amphibious vehicles, boats, maritime artifacts |
| Bellingham Railway Museum | Bellingham | Whatcom | Northwest | Railroad | Includes model train layout, railroad memorabilia, lanterns, train simulator, models of antique logging equipment |
| Benton County Historical Museum | Prosser | Benton | Central | History - Local | , includes antique clothing, furniture, dishes and glassware, quilts |
| Big Bend Historical Society Museum | Wilbur | Lincoln | Eastern | History - Local | Located in a former church, antiques, gems and minerals, military items, toys and dolls, farm implements, furniture, bottles, radios |
| Bigelow House Museum | Olympia | Thurston | Puget Sound | Historic house | 1850s house with original documents, artifacts, and furnishings |
| Bing Crosby Museum | Spokane | Spokane | Eastern | Biography | , at Gonzaga University, memorabilia of singer and movie star Bing Crosby |
| Black Diamond Museum | Black Diamond | King | Puget Sound | History - Local | , operated by the Black Diamond Historical Society in a historic depot |
| Blackman House Museum | Snohomish | Snohomish | Puget Sound | History - Local | , operated by the Snohomish Historical Society, late 19th-century house |
| Boldman House Museum | Dayton | Columbia | Eastern | Historic house | , operated by the Dayton Historical Depot Society, Victorian period house |
| Bothell Historical Museum | Bothell | King | Puget Sound | History - Local | |
| Breazeale Interpretive Center | Anacortes | Skagit | Northwest | Natural history | Natural history and ecology of the Padilla Bay National Estuarine Research Reserve |
| Browns Point Lighthouse Park | Browns Point | Pierce | Puget Sound | Maritime | Includes the History Center, Boat House Museum and tours of the lighthouse |
| Bruce Memorial Museum | Waitsburg | Walla Walla | Eastern | History - Local | , operated by the Waitsburg Historical Society, also tours of the adjacent Victorian-period Wilson-Phillips House |
| Camlann Medieval Village | Carnation | King | Puget Sound | Living | Recreates rural life in England in 1376 |
| Carpenter House Museum | Cle Elum | Kittitas | Central | Historic house | , 1914 Victorian mansion, operated by the Northern Kittitas County Historical Society, includes High Country Artists art gallery |
| Cascadia Art Museum | Edmonds | Snohomish | Puget Sound | Art | |
| Cashmere Museum and Pioneer Village | Cashmere | Chelan | Central | Open-air | , operated by the Chelan County Historical Society, complex include museum with local history, Native American, archaeology and natural history displays, pioneer village with 20 structures |
| Cedar Creek Grist Mill | Woodland | Clark | Southwest | Mill | Working late 19th century water-powered grist mill |
| Central Washington Agricultural Museum | Union Gap | Yakima | Central | Agriculture | , , open for special events with agriculture equipment displays and demonstrations |
| Charles R. Conner Museum | Pullman | Whitman | Eastern | Natural history | , part of Washington State University in Abelson Hall, displays over 700 mounts of birds and mammals |
| Chehalis–Centralia Railroad | Chehalis | Lewis | Southwest | Railroad | Heritage railroad and museum |
| Chelan Museum | Chelan | Chelan | Central | History - Local | , operated by the Lake Chelan Historical Society |
| Cheney Historical Museum | Cheney | Spokane | Eastern | History - Local | , history of the Four Lakes, Marshall, Cheney, Tyler, and Amber districts |
| Chewelah Museum | Chewelah | Stevens | Eastern | History - Local | |
| Children's Museum of Skagit County | Burlington | Skagit | Northwest | Children's | |
| Children's Museum of Tacoma | Tacoma | Pierce | Puget Sound | Children's | |
| Children's Museum of Walla Walla | Walla Walla | Walla Walla | Eastern | Children's | |
| Clark County Historical Museum | Vancouver | Clark | Southwest | History - Local | Operated by the Clark County Historical Society |
| Clymer Museum | Ellensburg | Kittitas | Central | Art | , works of John Clymer and other regional artists |
| Coastal Interpretive Center | Ocean Shores | Grays Harbor | Southwest | Multiple | , natural history, ecology, local history, Native Americans |
| Colbert House Museum | Ilwaco | Pacific | Southwest | Historic house | Late 19th-century house: non-operational as of 2009 |
| Columbia River Gorge Interpretive Center Museum | Stevenson | Pacific | Central | History - Local | , |
| Columbia Pacific Heritage Museum | Ilwaco | Pacific | Southwest | History - Local | , formerly the Ilwaco Heritage Museum |
| Colville Tribal Museum | Coulee Dam | Douglas | Eastern | Ethnic - Native American | |
| Connell Heritage Museum | Connell, Washington | Franklin | Eastern | History - Local | The museum collects, preserves, and shares the history and culture of Connell and the surrounding area, located in a beautifully restored 1905 Gothic Revival Church, surrounded by the Old Town Park. Facebook @ConnellHeritageMuseum |
| Commanding Officer’s Quarters | Port Townsend | Jefferson | Olympic Peninsula | Military | Part of Fort Worden State Park, operated by the Jefferson County Historical Society |
| Conconully Museum | Conconully | Okanogan | Central | History - Local | Operated by the Conconully Area Historical Association |
| Concrete Heritage Museum | Concrete | Skagit | Northwest | History - Local | Formerly the Camp 7 Museum, exhibits include logging, cement plants, miners, a cook shack, household items, construction of the Baker River Dam and other dams |
| Corbin Art Center | Spokane | Spokane | Eastern | Art | , includes an exhibit gallery |
| Cougar Mountain Zoo | Issaquah | King | Puget Sound | Natural history | Includes wildlife museum, bronze animal sculptures, animal and nature art |
| Cowlitz County Historical Museum | Kelso | Cowlitz | Southwest | History - Local | County history |
| Crosby House | Tumwater | Thurston | Puget Sound | Historic house | , mid 19th-century period house |
| CWU Museum of Culture & Environment | Ellensburg | Kittitas | Central | Anthropology | , part of Central Washington University, formerly the Museum of Man, includes large collection of Native American artifacts |
| D. O. Pearson House Museum | Stanwood | Snohomish | Puget Sound | Historic house | , operated by the Stanwood Area Historical Society, late 19th-century Victorian period house |
| Dayton Historic Depot | Dayton | Columbia | Eastern | History - Local | , operated by the Dayton Historical Depot Society, includes an art gallery |
| Discovery Village | Gig Harbor | Pierce | Puget Sound | Children's | |
| DuPont Museum | DuPont | Pierce | Puget Sound | History - Local | Exhibits include former DuPont Company and impact on region, Fort Nisqually, period home, village and school displays |
| East Benton County Historical Museum | Kennewick | Benton | Central | History - Local | , themes include agriculture, military, transportation, education; operated by the East Benton County Historical Society |
| Eastside Heritage Center | Bellevue | King | Puget Sound | History - Local | Displays are located around the county |
| Edmonds Historical Museum | Edmonds | Snohomish | Puget Sound | History - Local | City history and culture |
| Ferndale Pioneer Park | Ferndale | Whatcom | Northwest | Open-air | , operated by the Ferndale Heritage Society, relocated log houses and other structures |
| Ferry County Historical Center | Republic | Ferry | Eastern | History - Local | , operated by the Ferry County Historical Society |
| Flying Heritage Collection | Everett | Snohomish | Puget Sound | Aviation | Restored WWII aircraft |
| Foothills Historical Society & Museum | Buckley | Pierce | Puget Sound | History - Local | |
| Forest Learning Center | Mount St. Helens National Volcanic Monument | Cowlitz | Southwest | Natural history | , operated by Weyerhauser. located inside the blast zone of the May 18, 1980 eruption at Mount St. Helens, effects of the blast and logging recovery efforts |
| Forks Timber Museum | Forks | Clallam | Olympic Peninsula | Industry - Timber | , tools, logging equipment, bunkhouse display, homesteading, farming and logging in the Pacific Northwest |
| Fort Columbia State Park | Chinook | Pacific | Southwest | Military | Original U.S. Army Coastal Artillery fort buildings and batteries, active from 1896 to 1947, interpretive center |
| Fort Flagler State Park | Marrowstone | Jefferson | Olympic Peninsula | Military | History and artifacts from the 20th-century fort |
| Fort Nisqually Living History Museum | Tacoma | Pierce | Puget Sound | Fort - Living history | 19th century living history fort |
| Fort Okanogan Interpretive Center | Brewster | Okanogan | Central | History | History of the former early 19th century fur trading post |
| Fort Simcoe State Park | White Swan | Yakima | Central | Military | 1850s fort with restored officer's houses and a visitor center with exhibits |
| Fort Spokane Museum and Visitor Center | Davenport | Lincoln | Eastern | Military | , part of Lake Roosevelt National Recreation Area, late 19th-century Indian Frontier fort and later Indian boarding school |
| Fort Steilacoom | Steilacoom | Pierce | Puget Sound | Military | Displays artifacts and history of the fort, open for special events and living history re-enactments |
| Fort Vancouver National Historic Site | Vancouver | Clark | Southwest | Military | 19th century fur trading outpost with living history demonstrations |
| Fort Walla Walla Museum | Walla Walla | Walla Walla | Eastern | History - Living history | Includes open-air pioneer village, exhibit halls with military, agriculture, and history exhibits, also living history programs |
| Foss Waterway Seaport | Tacoma | Pierce | Puget Sound | Maritime | , boats, history of the region's working waterfront and science of Puget Sound's waterways |
| Fox Island Museum | Fox Island | Pierce | Puget Sound | History - Local | |
| Frank R. Burroughs Home Museum | Ritzville | Adams | Eastern | Historic house | Turn-of-the century period house |
| Franklin County Historical Museum | Pasco | Franklin | Eastern | History - Local | , themes include North American Indian artifacts, Lewis and Clark's corps of discovery, railroads, agriculture, irrigation, ferries & bridges, naval air base, healthcare; operated by the Franklin County Historical Society |
| Furford Cranberry Picker Museum | Grayland | Grays Harbor | Southwest | Agriculture | Cranberry industry equipment and materials |
| Future of Flight Aviation Center & Boeing Tour | Mukilteo | Snohomish | Puget Sound | Aerospace | Commercial jet aviation and future airplane designs |
| Garfield County Museum | Pomeroy | Garfield | Eastern | History - Local | |
| Gilman Town Hall Museum | Issaquah | King | Puget Sound | History - Local | |
| Ginkgo Petrified Forest State Park | Vantage | Kittitas | Central | Natural history | Petrified wood found in the park |
| Gorge Heritage Museum | Bingen | Klickitat | Central | History - Local | , operated by the West Klickitat County Historical Society, tools, clothing, furnishings, photos |
| Granite Falls Historical Museum | Granite Falls | Snohomish | Puget Sound | History - Local | , operated by the Granite Falls Historical Society |
| Grant County Historic Museum and Village | Ephrata | Grant | Central | Open-air | Includes one room school house, pioneer homestead with outbuildings, an old-time saloon, blacksmith shop, pioneer line cabin, a print shop, and a camera shop |
| Hands On Children's Museum | Olympia | Thurston | Puget Sound | Children's | |
| Hanford Reach Interpretive Center | Richland | Benton | Central | Multiple | Geology and natural history of the Hanford Reach National Monument, history of the Hanford Site and Manhattan Project, timeline of the Federal Columbia River Power System, area history |
| Harbor History Museum | Gig Harbor | Pierce | Puget Sound | History - Local | Area history, culture, maritime heritage |
| Heritage Flight Museum | Burlington | Skagit | Northwest | Aviation | Restored flying World War II, Korean and Vietnam era aircraft |
| Heritage Park | Lynnwood | Snohomish | Puget Sound | Local history | Includes Alderwood Manor Heritage Cottage and Wickers Museum |
| Hunters Museum | Hunters | Stevens | Eastern | History - Local | |
| Hydroplane & Raceboat Museum | Kent | King | Puget Sound | Sports | , history of the sport of hydroplane racing |
| Imagine Children's Museum | Everett | Snohomish | Puget Sound | Children's | Over 20 interactive exhibits |
| Island County Historical Society Museum | Whidbey Island | Island | Puget Sound | History - Local | |
| Issaquah Depot Museum | Issaquah | King | Puget Sound | History - Local | Displays include industrial revolution, travel, communication, early economic development of Issaquah |
| Jansen Art Center | Lynden | Whatcom | Northwest | Art | , community art center with exhibit gallery |
| Jefferson Museum of Art & History | Port Townsend | Jefferson | Olympic Peninsula | History - Local | |
| Job Carr Cabin Museum | Tacoma | Pierce | Puget Sound | Historic house | , replica cabin of Tacoma's first Euro American settler |
| Johnson Farm Museum | Anderson Island | Pierce | Puget Sound | Farm | , operated by the Anderson Island Historical Society, farm homestead and outbuildings |
| Jundt Art Museum | Spokane | Spokane | Eastern | Art | , at Gonzaga University, changing exhibits |
| Karpeles Manuscript Library Museum | Tacoma | Pierce | Puget Sound | Library | Changing exhibits of historic documents from its collections |
| Karshner Museum | Puyallup | Pierce | Puget Sound | Multiple | Also known as the Paul H. Karshner Memorial Museum, includes natural history items, Native American and world culture artifacts, owned by a local school district |
| Keller Heritage Center Museum and Park | Colville | Stevens | Eastern | Open-air | , operated by the Stevens County Historical Society, includes museum with Native American, pioneer, Main Street stores and local history displays, Keller House of 1910, Graves Mt. Lookout Tower, schoolhouse, cabins, pioneer machinery museum, sawmill, blacksmith shop, mining equipment |
| Kettle Falls Historical Center | Kettle Falls | Stevens | Eastern | History - local | |
| Kids Discovery Museum | Bainbridge Island | Kitsap | Puget Sound | Children's | , also known as KiDiMu |
| KidsQuest Children's Museum | Bellevue | King | Puget Sound | Children's | |
| Kirkman House Museum | Walla Walla | Walla Walla | Eastern | Historic house | Victorian period house |
| Kitsap County Historical Society Museum | Bremerton | Kitsap | Puget Sound | History - Local | , includes period household and store displays, exhibits of a school, a fire department, Native American life, the lumber industry, shipbuilding, and a clock collection |
| Kittitas County Historical Museum | Ellensburg | Kittitas | Central | History - Local | , includes pioneer, Native American, business, and military displays, exhibits of an antique car collection, doll collection, and rock and mineral collection |
| Kittredge Gallery | Tacoma | Pierce | Puget Sound | Art | , part of the University of Puget Sound, contemporary art |
| La Conner Quilt & Textile Museum | La Conner | Skagit | Northwest | Textile | , quilts and textiles from local, national, and international artists; located in the historic Gaches Mansion |
| Lasting Legacy Wildlife Museum | Ritzville | Adams | Eastern | History - Natural | Features over 600 taxidermy animals from all over the world |
| Lake Stevens Museum | Lake Stevens | Snohomish | Puget Sound | History - Local | Includes local history displays in a former general store and adjacent 1920s-era Paul & Bertha Grimm House |
| Larson Gallery | Yakima | Yakima | Central | Art | Part of Yakima Valley Community College |
| Leavenworth Nutcracker Museum | Leavenworth | Chelan | Central | Commodity - Nutcracker | Features over 5,000 nutcrackers originating from over 40 countries |
| Lelooska Museum | Ariel | Cowlitz | Southwest | Ethnic - Native American | Collections include baskets, parfleches, corn husk bags, dolls, spoons, cradles, moccasins, tomahawks, pipes, pipe bags, dresses, a 15-foot birch bark canoe and a replica fur trade store |
| Lewis and Clark Interpretive Center | Ilwaco | Pacific | Southwest | History | Located in Cape Disappointment State Park, story of the Lewis and Clark Expedition, also park cultural, military, maritime and natural history |
| Lewis Army Museum | Fort Lewis | Pierce | Puget Sound | Military | History of Fort Lewis and the military units that served there |
| Lewis County Historical Museum | Chehalis | Lewis | Southwest | History - Local | |
| Lincoln County Museum | Davenport | Lincoln | Eastern | History - Local | Operated by the Davenport Historical Society, county history and culture |
| Log Cabin Museum | Port Orchard | Kitsap | Puget Sound | Historic house | , operated by the Sidney Museum and Arts Association, features exhibits of home life in the South Kitsap area during the past 100 years |
| Longmire Museum | Longmire | Pierce | Puget Sound | Multiple | , at the Longmire Visitor's Center in Mount Rainier National Park, exhibits on the park's history, geology, wildlife and Native Americans |
| Loon Lake Museum | Loon Lake | Stevens | Eastern | History - Local | , located in a former school |
| Lopez Island Historical Society Museum | Lopez Island | San Juan | San Juan Islands | History - Local | |
| Lower Columbia College Art Gallery | Longview | Cowlitz | Southwest | Art | Located in the Rose Center for the Arts |
| Lynden Pioneer Museum | Lynden | Whatcom | Northwest | History - Local | , includes a life-size replica of Lynden's downtown, a full size farmhouse circa 1900, many vintage buggies, cars and tractors, agriculture equipment |
| Makah Museum | Neah Bay | Clallam | Olympic Peninsula | Ethnic - Native American | Artifacts and life of pre-contact Makah people |
| Martinson Cabin | Poulsbo | Kitsap | Puget Sound | Historic house | Operated by the Poulsbo Historical Society in Nelson Park, Norwegian immigrant family home |
| Maryhill Museum of Art | Goldendale | Klickitat | Central | Art | Collections includes 20th-century European art, Native American artifacts, sculptures and art by Auguste Rodin, furniture and decorative art |
| McAllister Museum of Aviation | Yakima | Yakima | Central | Aviation | |
| McChord Air Museum | McChord Air Force Base | Pierce | Puget Sound | Aviation | Exhibits about McChord Field and a collection of restored military aircraft |
| Meeker Mansion | Puyallup | Pierce | Puget Sound | Historic house | |
| Mobius Kids | Spokane | Spokane | Eastern | Children's | |
| Mobius Science Center | Spokane | Spokane | Eastern | Science | , themes include flight and engineering, space, human body, fluid dynamics, sound, physics |
| Molson School Museum | Molson | Okanogan | Central | History - Local | Pioneer, farming, mining and school life in a historic school |
| Monarch Contemporary Art Center and Sculpture Park | Olympia | Thurston | Puget Sound | Art | Art center with gallery and 80-acre outdoor sculpture park |
| Monroe Historical Museum | Monroe | Snohomish | Puget Sound | History - Local | , operated by the Monroe Historical Society |
| Moses Lake Museum and Art Center | Moses Lake | Grant | Central | Multiple | Includes Native American artifacts, local and natural history displays, changing exhibits of art, operated by the City in the Moses Lake Civic Center |
| Mount St Helens Creation Center | Silverlake | Cowlitz | Southwest | Religious | Creationist displays |
| Mount St. Helens - Johnston Ridge Observatory | Toutle | Cowlitz | Southwest | Natural history | Closest view of the mountain, geology of the volcano, the eruption and the recovery of the area's plant and animal life |
| Mount St. Helens Visitor Center at Silver Lake | Silverlake | Cowlitz | Southwest | Natural history | Geology of the volcano, the eruption and the recovery of the area's plant and animal life, operated by the Washington State Parks and Recreation Commission |
| Mukilteo Light | Mukilteo | Snohomish | Puget Sound | Maritime | Lighthouse tours, maritime and local history exhibits |
| Museum & Arts Center in the Sequim-Dungeness Valley | Sequim | Clallam | Olympic Peninsula | History / Art | Changing exhibits of local art and history |
| Museum at the Carnegie | Port Angeles | Clallam | Olympic Peninsula | History - Local | , operated by the Clallam County Historical Society |
| Museum of Flight | Tukwila | King | Puget Sound | Aerospace | Includes commercial and military aircraft, space vehicles, science of flight |
| Museum of Glass | Tacoma | Pierce | Puget Sound | Art | Focus is 20th- and 21st-century glass |
| Museum of Northwest Art | La Conner | Skagit | Northwest | Art | Focus is Northwest School art movement |
| Museum of the Columbia | Rocky Reach Dam | Chelan | Central | History | , located at the Rocky Reach Dam powerhouse, exhibits include settlers and Native Americans, steam boaters, lumbermen, railroaders |
| Museum of the North Beach | Moclips | Grays Harbor | Southwest | History - Local | , operated by the Moclips-by-the-Sea Historical Society |
| Naval Undersea Museum | Keyport | Kitsap | Puget Sound | Maritime | Exhibits include the ocean environment, torpedoes, mine warfare, diving equipment, submarines |
| New Dungeness Lighthouse | Sequim | Clallam | Olympic Peninsula | Maritime | Tours of the working lighthouse |
| North Clark Historical Museum | Amboy | Clark | Southwest | History - Local | Located in the former Amboy United Brethren Church |
| North Spokane Farm Museum | Deer Park | Spokane | Eastern | Agriculture | , farm equipment and machinery, tools, period room displays |
| Northern Pacific Railway Museum | Toppenish | Yakima | Central | Railroad | Includes Northern Pacific Railway memorabilia and a full-scale 1930 vintage Northern Pacific freight train |
| Northwest Carriage Museum | Raymond | Pacific | Southwest | Transportation - Carriage | , 19th century horse-drawn vehicles |
| Northwest Museum of Arts and Culture | Spokane | Spokane | Eastern | Multiple | Visual art, American Indian and other cultures, regional history, historic Campbell House; formerly the Cheney Cowles Memorial Museum / Eastern Washington State History Museum |
| Northwest Railway Museum | Snoqualmie | King | Puget Sound | Railroad | Located in a depot, includes railway cars and locomotives, artifacts and memorabilia |
| Of Sea & Shore Museum | Port Gamble | Kitsap | Puget Sound | Natural history | Focus is shells, mollusks and other invertebrates, located on the 2nd floor of the Port Gamble General Store and Cafe |
| Okanogan County Historical Museum | Okanogan | Okanogan | Central | History - Local | Operated by the Okanogan County Historical Society |
| Old Molson Museum | Molson | Okanogan | Central | Open-air | Reassembled pioneer town of early 20th-century buildings, includes a bank, assay office, two homestead cabins and farm machinery |
| Olmstead Place State Park | Ellensburg | Kittitas | Central | Farm | Includes a working pioneer farm with 1875 log cabin, 1908 furnished farmhouse and outbuildings |
| Olympic Flight Museum | Olympia | Thurston | Puget Sound | Aviation | Restored vintage military aircraft and helicopters |
| Orcas Island Historical Museum | Eastsound | San Juan | San Juan Islands | History - Local | , late 19th-century homestead cabins displaying the life stories and material culture of the Native American and early European-American settlers |
| Oroville Train Depot Museum | Oroville | Okanogan | Central | History - Local | Operated by the Okanogan Borderlands Historical Society |
| Pacific Coast Cranberry Research Foundation Museum | Long Beach | Pacific | Southwest | Food | , cranberry farming and cranberries |
| Pacific County Museum | South Bend | Pacific | Southwest | History - Local | Operated by the Pacific County Historical Society |
| Palouse Discovery Science Center | Pullman | Whitman | Eastern | Science | |
| Palus Artifact Museum | Dayton | Columbia | Eastern | Ethnic - Native American | Collection of locally found artifacts from the Palouse Indian tribe, also native plants |
| Pearson Air Museum | Vancouver | Clark | Southwest | Aviation | |
| Pend Oreille County Museum | Newport | Pend Oreille | Eastern | Open-air | , complex includes local history museum, schoolhouse, two cabins, a fire lookout, equipment shed with tools, farm machinery, a washing machine display, and a logging camp bunkhouse replica, and a caboose |
| Perkins House | Colfax | Whitman | Eastern | Historic house | , Victorian period house, operated by the Whitman County Historical Society, also known as the James A. Perkins House |
| Pioneer Farm Museum & Ohop Indian Village | Eatonville | Pierce | Puget Sound | Living history - Farm - Native American | , 1880s pioneer village and Native American village |
| Point No Point Lighthouse | Hansville | Kitsap | Puget Sound | Maritime | Lighthouse to tour |
| Polson Museum | Grays Harbor | Grays Harbor | Southwest | History - Local | , mansion houses local history displays including logging, sports, clothing, toys, china, Native American artifacts, period roomsnately, our kitchenware offers no food. |
| Pomeroy Living History Farm | Yacolt | Clark | Southwest | Living history - Farm | Depicts early 20th century and modern domestic and farm life |
| Port Angeles Fine Arts Center | Port Angeles | Clallam | Olympic Peninsula | Art | , exhibits of contemporary visual art in all media, also outdoor art displayed in Webster’s Woods Art Park |
| Port Gamble Historic Museum | Port Gamble | Kitsap | Puget Sound | History - Local | , includes period room displays, located on the 1st floor of the Port Gamble General Store and Cafe |
| Port Townsend Aero Museum | Port Townsend | Jefferson | Olympic Peninsula | Aviation | Antique and classic aircraft, located at Jefferson County International Airport |
| Port Townsend Marine Science Center | Port Townsend | Jefferson | Olympic Peninsula | Natural history / Aquarium | , coastal environment and natural history |
| Poulsbo Historical Society Museum | Poulsbo | Kitsap | Puget Sound | History - Local | |
| Poulsbo Marine Science Center | Poulsbo | Kitsap | Puget Sound | Natural history | , marine life and ecosystems |
| Puget Sound Coast Artillery Museum | Port Townsend | Jefferson | Olympic Peninsula | Military | History of Fort Worden, coast artillery history and the harbor defenses of Puget Sound |
| Puget Sound Navy Museum | Bremerton | Kitsap | Puget Sound | Maritime | Naval heritage of the Pacific Northwest including the Puget Sound Naval Shipyard, USS John C. Stennis and more |
| Quilcene Historical Museum | Quilcene | Jefferson | Olympic Peninsula | History - Local | |
| Renton History Museum | Renton | King | Puget Sound | History - Local | City history and culture |
| Ritzville Railroad Depot Museum | Ritzville | Adams | Eastern | Railroad | , Northern Pacific Railroad depot with railroad and turn-of-the-century historic displays |
| Robert P Worthman Anatomy Museum | Pullman | Whitman | Eastern | Natural history | , anatomy specimens of the College of Veterinary Medicine at Washington State University |
| Roslyn Museum | Roslyn | Kittitas | Central | History - Local | , history of the former coal mining town |
| Rothschild House | Port Townsend | Jefferson | Olympic Peninsula | Historic house | Operated by the Jefferson County Historical Society, 19th century period house |
| Roy M. Chatters Newspaper and Printing Museum | Palouse | Whitman | Eastern | Media | , operated by the Whitman County Historical Society, open by appointment, historic printing equipment |
| Ryan House Museum | Sumner | Pierce | Puget Sound | Historic house | Operated by the Sumner Historical Society, 1890s-period house with displays of local history |
| Sacajawea Interpretive Center | Pasco | Franklin | Eastern | History | Located in Sacajawea State Park, history of the Lewis and Clark Expedition, Sacajawea, and prehistoric Native American artifacts |
| San Juan Historical Museum | Friday Harbor | San Juan | San Juan Islands | History - Local | , operated by the San Juan Historical Society |
| San Juan Island National Historical Park | Friday Harbor | San Juan | San Juan Islands | Military | Sites of the British and U.S. Armies' camps during the mid 19th-century Pig War |
| San Juan Islands Museum of Art | Friday Harbor | San Juan | San Juan Islands | Art | , visual art with an emphasis on art from northwestern United States and southwestern Canada |
| Sand Man Tugboat | Olympia | Thurston | Puget Sound | Maritime | , restored early 20th-century tugboat museum ship |
| Sarah Spurgeon Gallery | Ellensburg | Kittitas | Central | Art | , part of Central Washington University |
| Scandinavian Cultural Center | Tacoma | Pierce | Puget Sound | Ethnic | , part of Pacific Lutheran University, heritage, history, and culture of Scandinavia |
| Sedro-Woolley Museum | Sedro-Woolley | Skagit | Northwest | History - Local | , exhibits include model train layout, blacksmith, bank, town hall, dentist, stable, coal mine, hospital, saloon, general store, garage, and telephone operator displays |
| Shafer Museum | Winthrop | Okanogan | Central | Open-air | , pioneer complex includes a log house with pioneer household items, 1890s general store, ladies shop with dolls and clothing, mining machinery, a print shop and a school house |
| Shanaman Sports Museum | Tacoma | Pierce | Puget Sound | Sports | , Washington state professional, college, high school and amateur sports teams and people |
| Shoreline Historical Museum | Shoreline | King | Puget Sound | History - Local | |
| Sidney Museum | Port Orchard | Kitsap | Puget Sound | History - Local | , operated by Sidney Museum and Arts Association, original Masonic Hall in Port Orchard and on the National Historic Register, features period displays of a general store, school, doctor's office and hardware store |
| Skagit County Historical Museum | La Conner | Skagit | Northwest | History - Local | |
| Slater Museum of Natural History | Tacoma | Pierce | Puget Sound | Natural history | , part of the University of Puget Sound, research museum with public displays |
| Snoqualmie Valley Historical Museum | North Bend | King | Puget Sound | History - Local | , includes pioneer and logging artifacts |
| Cle Elum | Kittitas | Central | Railroad | Located in Iron Horse State Park | |
| SPARK Museum of Electrical Invention | Bellingham | Whatcom | Northwest | Technology | Development and use of electricity, radio and the related inventions |
| Spokane House Interpretive Center | Nine Mile Falls | Spokane | Eastern | History | Located in Riverside State Park, open on weekends in summer, history of the fur trading post, military, Spokane Indians, pioneers |
| Spokane Valley Heritage Museum | Spokane Valley | Spokane | Eastern | History - Local | |
| Squaxin Island Tribe Museum Library and Research Center | Squaxin Island | Mason | Southwest | Ethnic - Native American | , history and culture of the Squaxin Island Tribe |
| Stanwood Area History Museum | Stanwood | Snohomish | Puget Sound | History - Local | , operated by the Standwood Area Historical Society |
| State Capital Museum | Olympia | Thurston | Puget Sound | History | , state history and culture, Native Americans, operated by the Washington State Historical Society |
| Steilacoom Tribal Cultural Center & Museum | Steilacoom | Pierce | Puget Sound | Ethnic - Native American | Located in a building erected in 1902 to house the Oberlin Congregational Church. |
| Stillaguamish Valley Pioneer Museum | Arlington | Snohomish | Puget Sound | History - Local | , homestead artifacts including photos, household items, logging, dairy, military, railroad, sports, medical, education, transportation music |
| Stonerose Interpretive Center and Fossil Site | Republic | Ferry | Eastern | Natural history | Eocene Epoch fossil site of insects, fish, leaves and twigs, bird feathers |
| Sunnyside Historical Museum | Sunnyside | Yakima | Central | History - Local | , |
| Suquamish Museum | Suquamish | Kitsap | Puget Sound | Ethnic - Native American | History and culture of the Puget Sound Salish Tribes |
| Tacoma Art Museum | Tacoma | Pierce | Puget Sound | Art | Collection includes American, European, and Asian art, highlighting Northwest artists, and traveling national and international exhibitions |
| Tacoma History Museum | Tacoma | Pierce | Puget Sound | History - Local | , operated by the Tacoma Historical Society |
| Tacoma Pioneer Telephone Museum | Tacoma | Pierce | Puget Sound | Technology | |
| Telephone Museum | Cle Elum | Kittitas | Central | Technology | , history of telephone technology from 1901 to 1970, coal mining artifacts, operated by the Northern Kittitas County Historical Society |
| Tenino Depot Museum | Tenino | Thurston | Puget Sound | History - Local | Located in a depot, open on weekend afternoons |
| Thorp Mill | Thorp | Kittitas | Central | Mill | Restored grist mill |
| Two Rivers Heritage Museum | Washougal | Clark | Southwest | History - Local | , operated by the Camas-Washougal Historical Society |
| USS Turner Joy Museum Ship | Bremerton | Kitsap | Puget Sound | Maritime | Navy destroyer from the Vietnam War |
| Verlot Ranger Station-Public Service Center | Granite Falls | Snohomish | Puget Sound | Natural history | Visitor center and museum about Mount Baker-Snoqualmie National Forest |
| Veterans Memorial Museum | Chehalis | Lewis | Southwest | Military | |
| Vintage Motorcycle Museum | Chehalis | Lewis | Southwest | Transportation | Original and fully restored pre-1916 Indians, Harley-Davidsons, Excelsior, Pierces, Emblem, Thor, Henderson, Sears, Yale, Reading Standard, bicycles |
| Wahkiakum County Historical Society Museum | Cathlamet | Wahkiakum | Southwest | History - Local | |
| Wanapum Heritage Center | Wanapum Dam | Grant | Central | Ethnic - Native American | , history and culture of the Wanapum, area history |
| Washington National Guard Museum | Camp Murray | Pierce | Puget Sound | Military | History of the Washington National Guard |
| Washington State History Museum | Tacoma | Pierce | Puget Sound | History | Washington's history and culture |
| Washington State University Geology Museums | Pullman | Whitman | Eastern | Geology | , part of Washington State University, displays in three buildings |
| Washington State University Museum of Anthropology | Pullman | Whitman | Eastern | Anthropology | , part of Washington State University, archaeological and ethnographic artifacts |
| Washington State University Museum of Art | Pullman | Whitman | Eastern | Art | , part of Washington State University, modern and contemporary art |
| West Coast Clock & Watch Museum | Bellingham | Whatcom | Northwest | Horology | , located on the third floor of the Whatcom Museum, pocket watches, clocks and horological tools |
| Westport Maritime Museum | Westport | Grays Harbor | Southwest | Maritime | , located in a former U.S. Coast Guard lifeboat station, exhibits include the Coast Guard, Grays Harbor Light, whales and whaling, marine life and ecosystems, fishing industry, cranberry growing |
| Wenatchee Valley Museum & Cultural Center | Wenatchee | Chelan | Central | Multiple | Local history, art, culture and natural history |
| Western Gallery | Bellingham | Whatcom | Northwest | Art | , part of Western Washington University, contemporary art gallery and outdoor sculpture collection |
| Whale Museum | Friday Harbor | San Juan | San Juan Islands | Natural history | Natural history of marine mammals with a special focus on orcas |
| Whatcom Museum | Bellingham | Whatcom | Northwest | Multiple | Contemporary art, Northwest history and culture, natural history, West Coast Clock and Watch Museum |
| White Bluffs Quilt Museum | Richland | Benton | Central | Textile | , regional textile arts center |
| White River Valley Museum | Auburn | King | Puget Sound | History - Local | Exhibits include 1920s period depot, Japanese American farmhouse, Main Street and hotel displays, Native American and pioneer artifacts, |
| White Pass Country Historical Museum | Packwood | Lewis | Southwest | History | located in a 1938 elementary school house. Local artifacts to bring back memories of yesteryear. |
| Whitman Mission National Historic Site | Walla Walla | Walla Walla | Eastern | History | Park and visitor museum about the 1847 massacre of Methodist missionaries |
| Whoop-n-Holler Museum | Bickleton | Klickitat | Central | History | Collection of antique cars and vehicles, household items, tools, and agricultural exhibits |
| Willapa Bay Oyster House Interpretive Center | Nahcotta | Pacific | Southwest | Maritime | , features replica of the residence of oystermen and their families, exhibits about the oyster industry |
| Willapa Seaport Museum | Raymond | Pacific | Southwest | Maritime | Includes photographs, paintings, drawings, ship models, and artifacts used in working, sailing and navigating ships |
| World Kite Museum | Long Beach | Pacific | Southwest | Sports | , history of kites, kitemakers and famous kite fliers |
| Yakama Nation Museum | Toppenish | Yakima | Central | Ethnic - Native American | , history and culture of the Yakama |
| Yakima Electric Railway Museum | Yakima | Yakima | Central | Railroad | Electric trolleys |
| Yakima Valley Museum | Yakima | Yakima | Central | History / Natural history | Includes area natural history, American Indian culture, pioneer life, early city life, fruit industry |
Defunct museums
- Camp 6 Logging Museum, Tacoma, closed in 2011
- Castle Rock Exhibit Hall, Castle Rock, closed in 2014
- Children's Activity Museum, Ellensburg, closed in 2014
- Columbia River Exhibition of History, Science, and Technology, Richland, closed in 2014
- Consolidated Works - Seattle
- Fairchild Heritage Museum & Air Park, closed in 2002
- Rosalie Whyel Museum of Doll Art, Bellevue, closed in 2012
- Three Rivers Children's Museum, Richland
- Washington State Railroads Historical Society Museum, Pasco
- Western Bridge, Seattle